1. Clinical and Molecular Virology Laboratory, University of Edinburgh, Edinburgh, United Kingdom;
2. Sir Richard Doll Building, Institute of Cancer Research, Sutton, United Kingdom;
3. Scottish National Blood Transfusion Service, Royal Infirmary, Edinburgh, United Kingdom;
4. Department of Pathology, Royal Infirmary, Edinburgh, United Kingdom;
5. Department of Immunology, Royal Free Hospital and University College Medical School, London, United Kingdom;
6. Liver Unit, Birmingham Children's Hospital, Birmingham, United Kingdom;
7. Liver Transplant Unit, Edinburgh Royal Infirmary, Edinburgh, United Kingdom,
8. Immunohaematology Laboratory, Queensland Institute of Medical Research, Brisbane, Australia